| 1 | GDR | GVG Airlines Company | Callsign: Valiko, | KZ | AVCODES |
| 2 | GDR | Gadair European Airlines, S.L. | Callsign: Gadair Lines, | E | AVCODES |
| 3 | GDRA | GARDNER, ARLON TRUCKING | | | SCAC4 |
| 4 | GDRB | GERARD, ROBERT | | | SCAC4 |
| 5 | GDRD | GRACE, DAN | | | SCAC4 |
| 6 | GDRE | GREEN, DARRELL L INC | | | SCAC4 |
| 7 | GDRF | GOUDREAU TRUCKING INC | | | SCAC4 |
| 8 | GDRG | GOODRICH TRANSPORT LTD | | | SCAC4 |
| 9 | GDRK | GOOD, RODNEY TRUCKING | | | SCAC4 |
| 10 | GDRL | GOLDEN EAGLE OIL REFINERY INC | | | SCAC4 |
| 11 | GDRN | GRANDRIDGE CARRIERS INC | | | SCAC4 |
| 12 | GDRQ | GRUPO DOBLE RR REFRIGERADOS SA DE C | | | SCAC4 |
| 13 | GDRR | GRAND RAPIDS TRANSPORT INC | | | SCAC4 |
| 14 | GDRT | GODARD, RON TRUCKING | | | SCAC4 |
| 15 | GDRTA | Greater Dayton Regional Transit Authority | Real: RTA, City: Dayton (OH) | US-OH | TRAFFIC |
| 16 | GDRV | GLENDALE RECREATIONAL VEHICLES | | | SCAC4 |
| 17 | GDRY | GUIDRY TRUCKING | | | SCAC4 |
